Gonçalo Byrne’s architectural contribution to the 1998 World Exposition in Lisbon is a remarkable blend of functionality and artistic expression. The project, centered around a restaurant space, was executed with a keen sense of harmony and environmental interaction. Byrne’s design features a reinforced concrete retaining wall, flanked by two distinct volumes, creating a balanced and symmetrical composition. A pergola spans between these volumes, offering shade and openness to a large terrace that invites engagement with the surrounding landscape. The collaboration with sculptor João Cutileiro introduced an artistic dimension, with marble female figures reminiscent of the Tagus River nymphs, placed in a water mirror designed by Byrne. This reflective element enhances the aesthetic, playing with light and shadow to add dynamism. Byrne’s philosophy of integrating art and architecture is evident, creating a dialogue between the built environment and natural elements. The use of concrete and marble contrasts the structure’s solidity with the sculptures’ fluidity, symbolizing the interplay of permanence and transience. The terrace, offering expansive views, encourages reflection, transforming the space into a destination for contemplation and inspiration. Byrne’s vision of creating a stage for interaction, where architecture and art converge, celebrates the ephemeral beauty of the moment, resonating with the spirit of the World Exposition.